Definición de stereogram en inglés:

sustantivo

When comparing c axis orientations relative to the whole organism, c axes are plotted on stereograms that represent an oral view of the specimen, such that the oral-aboral axis plots vertically, at the center of the stereogram.

It was reminiscent of a stereogram, hinting at some ‘three dimensional’ image that would pop into view if you looked at it just right and concentrated hard enough.